Collapsible greenhouse



FIG. 1 is a front perspective view of a collapsible greenhouse showing my new design with a door flap in a closed position;

FIG. 2 is a front elevational view thereof with the door flap in the closed position;

FIG. 3 is a right side side elevational view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a top view thereof; and,

FIG. 6 is a front perspective view thereof with the door flap in an open position. 

CLAIM The ornamental design for a collapsible greenhouse, as shown and described. 